® Honda Inline Four
Wire Color Codes

Battery From To
Red Mainfuse Keyswitch
Black Keyswitch Fuses, Switches, Components  
Green 2            Components                   Frame
The section above applies to each of the sections below.
Because of this, each of the following sections begins with the keyswitch.
Headlight From To
Black Keyswitch Headlight Fuse
Black/Red Headlight Fuse Starter Button
Blue/White Starter Button Hi/Lo Switch
Blue Hi/Lo Switch High Beam
White Hi/Lo Switch Low Beam
Tailight From To
Black Keyswitch Pos/Instr/Tail Fuse
Brown/Blue Pos/Instr/Tail Fuse Rt H/Bar Sw Plug Pigtail
Brown/White Rt H/Bar Sw Plug Pigtail (Back to the) Keyswitch
Brown Keyswitch Taillight
Stoplight From To
Black Keyswitch Stop/Signal/Horn Fuse
White/Green Stop/Signal/Horn Fuse Frt and Rear Stop Switches 
Green/Yellow Frt and Rear Stop Switches Stoplight
Signals From To
Black Keyswitch Stop/Signal/Horn Fuse
White/Green Stop/Signal/Horn Fuse Turnsignal Relay
Grey Turnsignal Relay Turnsignal Switch
Light Blue Turnsignal Switch Right Turnsignals
Orange Turnsignal Switch Left Turnsignals
Horn From To
Black Keyswitch Stop/Signal/Horn Fuse
White/Green Stop/Signal/Horn Fuse Horn(s)
Light Green Horn(s) Horn Button
Green Horn Button Wiring Harness "Ground"3
Charge From To
Black Keyswitch Reg/Rect, Field Coil 4
White Field Coil Regulator/Rectifier
Yellow Alternator Stator Regulator/Rectifier
Red/White Regulator/Rectifier Battery
Start From To
Black Keyswitch Starter Button
Yellow/Red Starter Button Starter Solenoid
Green/Red Starter Solenoid Clch Sfty Sw, Ntrl Lt Diode
Green Clutch Safety Switch Wiring Harness "Ground"
Lt Green/Red Neutral Light & Diode Neutral Switch
Ignition From To
Black Keyswitch Engine Kill Switch
Black/White Engine Kill Switch Ignition Coils
Blue Points or Pulser 1&4 Coil or Spark Unit 1&4
Yellow Points or Pulser 2&3 Coil or Spark Unit 2&3

1. This table starts at 1975 because prior to that Honda used a different starting system, headlight system and fewer fuses. It includes only inline fours because the company's twins, opposed fours and V4s all use a different type of alternator. The CBX, an inline six, is however nearly identical to this table, saving that the pulsers are wired a little differently, due to a different firing order, and of course there is one more pulser, a pink wire.

2. Honda's colors for switched power (black) and for ground (green) are opposite most other company's.

3. Honda has from the beginning, and even more so in later years, relied on very few physical grounds, preferring instead component ground loops back into the wire harness for a central ground on the frame. A very good practice which the other manufacturers did not start until quite recently.

4. The second black out of the regulator/rectifier has been omitted because the two are of equal potential, that is, both are switched battery voltage.

           Mike Nixon